Fig. 3
Case 3. Sagittal T1-weighted (a), sagittal T2-weighted (b), sagittal fat suppressed T2-weighted (c) MRI images showing a spindle shaped epidural mass extending from T4 to T6. The mass is hypointense in T1, with inhomogenous fat signals in both ends, hyperintense in T2 weighted imaging. The fat signals were suppressed in fat suppressed T2. Thin-strips or spots of vessels can be seen inside the tumor. Axial T2-weighted (d, e) images showed the tumor extends into bilateral neural foramen and compresses the spinal cord anteriorly. The mass is low signal in DWI (f) and high signal in ADC (g), no obvious diffusion restriction was observed. ADC value is 1.971 × 10−3mm2/s. In sagittal fat suppressed T1-weighted post-contrast (h) image, the mass is significantly and homogenously enhanced. The dynamic contrast enhanced curve (i) showed the rapid rising and slow decline phases, indicating the vascular component is predominating. Histological sections (j) shows tumor is composed of abundant vascular channel filled with red blood cells and fibrin thrombi and mature adipose tissue